NC0000353_Memo_19960815

-IL% State of North Carolina
Department of Environment, Tgyirr ,
Health and Natural Resources y •
Division of Water Quality is
James B. Hunt, Jr., Governor 1
Jonathan B. dSecretary
A. Preston Howard, Jr., P.E., Director
Asheville Regional Office
WATER QUALITY SECTION
August 15, 1996
MEMORANDUM
TO: Dave Goodrich
Permits and Engineeri g Unit
THROUGH: Forrest R. Westa 1
Regional Water Qu r, Supervisor
FROM: Mike Parker/Of
Environmental Chemist
SUBJECT : Staff Reports
Feldspar Mining Company' s
Avery and Mitchell County' s
I have completed the staff reports and recommendations for
the following facilities :
The Feldspar Corporation NPDES Permit No. NC0000353
K-T Feldspar Corporation NPDES Permit No. NC0000400
Unimin Corporation-Schoolhouse NPDES Permit No. NC0000361
Unimin Corporation-Crystal NPDES Permit No. N00084620
Unimin Corporation-Quartz NPDES Permit No. NC0000175
It is requested that all of these permits be sent to public
notice and issued at the same time with the same expiration
dates . As you know all of these permit are interdependent on
each other because of the fluoride allocation in the North Toe
River. The total allocation of fluoride (574 lbs/day) is
allocated between these companies .
Also, please refer to the attached letter dated June 21 ,
1995, to Representative Charles Buchanan from Steve Tedder,
advising that the fluoride allocation will not be reduced when
the permits are reissued.
Interchange Building,59 WoodfineducedC FAX [phone]
Asheville,North Carolina 28801 1 An Equal Opportunity/Affirmative Action Employer
Voice 704-251-6208
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•
Dave Goodrich Memo
August 15, 1996
Page Two
Additionally, chlorides have been noted in the results of
the Annual Pollutant Analysis data provided by these companies .
It may need to be added to the permits as a new parameter. If it
is decided to be added it is recommended that monitoring only be
conducted until we have adequate data to determine it limits are
necessary.
If you have questions or would like to discuss the staff
reports, please call me at 704-251-6208 .

r
'': State of North Carolina
Department of Environment,
Health and Natural Resources
Division of Environmental Management •
James B. Hunt, Jr., Governor
Jonathan
A. B. dSecretaryE., Director 1=30c I____I
A. Preston Howard, Jr., P.E., DL�
June 21, 1995
Representative Charles Buchanan
Route 1, Box 273
Green Mountain,North Carolina 28740
Re: Fluoride
Dear Representative Buchanan:
This correspondence is to clarify our position and hopefully to address concerns expressed by several
feldspar and quartz processing operations near Spruce Pine concerning fluoride limitations within their
NPDES permits.
The Water Quality Section of the Division of Environmental Management has worked closely with the
mining facilities on the fluoride allocation issue for several years. In 1985 we worked with the mining
operations to allocate the available assimilative capacity of the North Toe River in consultation with the
mining interests in that area.
The industries have expressed concerns that we may modify the allocations upon permit renewal in
1996. Although an error in mass calculations has been noted, I can assure you that there will not be a
reduction in allowable pounds allocated to these facilities for fluoride upon permit re-issuance. We will
continue to monitor the situation as the allocation for fluoride has been exhausted in the North Toe River
near Spruce Pine.
I have relayed this information previously to Unimin Corporation and to Charles Case and Lucius
Pullen.
If there are additional questions,please do not hesitate to call.
Sincerely
•
Steve W.Tedder,Chief
SWT: s Water Quality Section
cc: Forrest Westall ` `
Don Safrit •
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
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TO: PERMITS AND ENGINEERING UNIT
WATER QUALITY SECTION
Attention: Paul Clark
DATE: July 23, 1996
NPDES STAFF REPORT AND RECOMMENDATION
COUNTY Mitchell
PERMIT NUMBER NC0000353
PART I - GENERAL INFORMATION
1. Facility and Address: The Feldspar Corporation
Post Office Box 99
Spruce Pine, North Carolina 28777
2. Date of Investigation: July 18, 1996
3 . Report Prepared By: Michael R. Parker
4. Persons Contacted and Telephone Number: Thomas Freeman
704/765-8955
5. Directions to Site: From the intersection of U.S. Highway 19E and
NCSR 1121 in Spruce Pine, N.C. , travel east on NCSR 1121
approximately 0 .4 mile. The Feldspar Corporation is located on
the right side of the highway and the wastewater treatment
facility is located behind the manufacturing plant near the river.
6. Discharge Point (s) , List for all discharge points:
Latitude: 001 350 54' 16" Longitude: 82° 03' 47"
002 350 54' 17" 820 03' 40"
003 350 54' 17" 820 03' 42"
Attach a USGS map extract and indicate treatment facility site and
discharge points on map.
U.S.G.S. Quad No. D1ONE U.S.G.S. Quad Name Spruce Pine, N.C.
7. Size (land available for expansion and upgrading) : % acre
8. Topography (relationship to flood plain included) : The wastewater
treatment facility is located approximately 40 feet above the
river and is not subject to flooding.
9. Location of nearest dwelling: Greater than 500 feet .
Page 1

20. Receiving stream or affected surface waters: North Toe River
a. Classification: C-trout o4 03 O
b. River Basin and Subbasin No. : .03 04 0�
c. Describe receiving stream features and pertinent downstream
uses: fishing, wading, fish and wildlife propagation,
canoeing, industrial water supply, irrigation.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. Type of wastewater: % Domestic
100 t Industrial
a. Volume of Wastewater: 3 . 5 MGD (Design Capacity)
b. Types and quantities of industrial wastewater:Wastewater is
from the processing of ore to produce feldspar, mica, quartz
and sand.
c. Prevalent toxic constituents in wastewater: Fluoride.
d. Pretreatment Program (POTWs only) : NA
2. Production rates (industrial discharges only) in pounds per day:
a. Highest month in the past 12 months: 900 tons/day
b. Highest year in the past 5 years: lbs/day
3 . Description of industrial process (for industries only) and
applicable CFR Part and Subpart: The crushing of raw ore and
sending it through the various flotation processes for product
separation. In accordance with 40 CFR Part 436 Subpart I-Mica and
Sericite Subcategory has been reserved and Subpart AI-Feldspar
Subcategory has also been reserved. No effluent guidelines have
been published.
4. Type of treatment (specify whether proposed or existing) : 001-The
existing wastewater treatment process consist of a 3 .5 MGD
inorganic solids wastewater treatment system with lime and acid
feed systems for pH adjustment, polymer feed systems, cyclone
separator, vacuum filters, three clarifiers, flow measuring and
totalizing equipment and recycle pumps. 002 & 003 non-contact
cooling water.
5. Sludge handling and disposal scheme: Sludge from the wastewater
treatment facility is landfilled with approval of the Division of
Land Resources, Land Quality Section.
Page 2

•i
6. Treatment plant classification
Class III, (attach completed rating sheet) :
7• SIC Codes{s) : 3295
Wastewater Code (s) : Primary 41
Main TreatmentSecondary 14
Unit Code:
51002
PART III - OTHER PERTINENT INFO
RMATION
1. Is this facility
only) pbeing constructed with Construction Grant funds
2 . Special monitorin
I
rmi rtquests: Monitoring should be left
1 as in the
existing NPDES Per .
3 . Additional effluent limits requests:
• 4. Other:
PART IV - EVALUATION AND RECOMMENDATIONS
The Feldspar Corporation has 0
Numberhe No. NCCorpo 3 for requested renewal
wastewater the continued discharge fNInt Permiti
processt their from the production of elds r °f industrial
plant at Spruce Pine, North Carolina, P mica and sand
There are no effluent guidelines for this indust
limitations were developed using
and the North Water production and pr and the effluent
and heother Carolina
KQuality Standard of 1. 8 mg information
are four of eracom nils, Co Feldspar Corporation jmj There
corporation-Schoolhouse Corporation-Crystal Unimin
C rporati Quartz Operation which haveUsimin
dischargesduaprocesses and wastewater characteristics, Each similar
ive . proposes to discharge fluorides to the North Toe
Rpany
It has been determined that there is a maximum assimilative
capacity 574 lbs/daymouth of oft 574 Bear a Cof fluoride in the North Toe atthe
each other because the total assimilative capacityRiver at the
s otherallocated betweenustre fivealssiminduilativeAll five tt►itsnre iofethepfluori on
issued at the same time, les and all °f the fluoride
permits should be
The Feldspar Corporation has never discharged from
and 003 . discharges 002
There have been no changes in the discharge or the
treatment facility since the
It is recommended that permit was last issuedWastewater
the ig limits at the permit
be issued for five
received The Feldsra�irements. years with
received
the APA datade forithe Feldspar
Webut the not
included as a newh Corporation ma hotherto
parameter in this discharge. Chloride may need to be
recommended. permit. Monthly monitoring is
Page 3

"--e:41L
Si ature of Report eparer
1W1-- --;?‘144°
ater Qu ity Regional Supervisor
ir 94
Date
Page 4

RATING SCALE FOR- / -CLASSIFICATION OF WATER POLLUTION CONTROL SYSTEMS
A
Name of Facility: -IAA- Fea-C Apt, Co p ,.k? nAJ
Owner or Contact Person: 1k,. D. J AwJ .,. .r 11 Ou.c.gLe.c4
Mailing Address: P o . iswe 9 ry ser c� �, ,N L'- L9777
County: 1;�-e h e--// r Telephone: 7054 .76S-- S's-O a
Present Classification: New Facility Existing Facility L—
NPDES Per. No. NC00O03S.3 Nondisc. Per. No.WQ Health Dept.Per No.
Rated by: ;e_L4-< ( R. (1:;201,c,Imo-_ Telephone: 7°'/2 fJ-4 761, Date: /2 z-15-1Reviewed by: v Health Dept. • " Telephone:
"Pft-TA(. /.:#1 r t� Regional Office Telephone: -o2 s,-Gzc y
D Central Office Telephone:
ORC: Grade: Telephone:
Check Classification(s): Subsurface Spr- Irrigation Land Application
Wastewater Classification: (Circle One) I II IV Total Points: ,S9
kl-PLANT PROCESSES AND RELATED CONTROL EQUIPMENT WHICH ARE AN I EGRAL PART OF INDUSTRIAL PRODUCTION SHALL NOT BE
CONSIDERED WASTE TREATMENT FOR THE PURPOSE OF CLASSIFICATION.ALSO SEPTIC TANK SYSTEMS CONSISTING CNLYOF SEPTIC TANI(
AND GRAVITY NITRIFICATION LINES ARE EXEMPT FROM CLASSIFICATION.
SUBSURFACE CLASSIFICATION SPRAY IRRIGATION CLASSIFICATION
(check all units that apply) (check all units that apply)
1. septic tanks 1. preliminary treatment (definition no. 32 )
2. pump tanks 2. lagoons
3. siphon or pump-dosing systems 3. septic tanks
4. sand filters 4. pump tanks
• 5. grease trap/interceptor 5. pumps
6 oil/water separators 6. sand filters
7_ gravity subsurface treatment and disposal: 7. grease trap/interceptor
8. pressure subsurface treatment and disposal: 8. oil/water separators
9disinfection
10. chemical addition for nutrient/algae control
11. spray irrigation of wastewater
In addition to the above classifications, pretreatment of wastewater In excess of these components shall
be rated using the point rating system and will require an operator with an appropriate dual certification.
LAND APPLICATION/RESIDUALS CLASSIFICATION(Applies only to permit holder)
1. Land application of biosolids, residuals or contaminated soils on a designated site.
WASTEWATER TREATMENT FACILITY CLASSIFICATION
The following systems shall be assigned a Class I classification,unless the flow is of a significant quantity or the technology is unusually
complex,to require consideration by the Commission on a case-by-case basis: (Check if Appropriate)
1. OiUwater Separator Systems consisting only of physical separation,pumps and disposal;
2. Septic Tank/Sand Filter Systems consisting only of septic tanks, dosing apparatus, pumps,sand filters, disinfection
and direct discharge;
3. Lagoon Systems consisting only of preliminary treatment, lagoons, pumps, disinfection, necessary chemical treatment for
algae or nutrient control, and direct discharge;
4. Closed-loop Recycle Systems;
5. Groundwater Remediation Systems consisting only of oil/water separators, pumps, air-stripping, carbon adsorption, disinfection
and disposal;
6. Aquaculture operations with discharge to surface waters;
7. Water Plant sludge handling and back-wash water treatment;
8. Seafood processing consisting of screening and disposal.
9. Single-family discharging systems,with the exception of Aerobic Treatment Units, will be dassified if permitted after July 1,
1993 or if upon inspection by the Division, it is found that the system is not being adequately operated or maintained. Such
systems will be notified of the classification or reclassification by the Commission, in writing.

The following scale is used for rating wastewater treatment facilities: (circle appropriate points) • •
POINTS
ITEM
4
(I) Industrial Pretreatment Units or industrial Pretreatment Program(see definition No.33)
(2) DESIGN FLOW OF PLANT IN gpd(not applicable to non-contaminated cooing waters,sludge handing facilities for
water purification plants.totally closed cycle systems(see definition No.11),and facilities consisting only of Item
(4)(d) or items (4)(d) and (11)(d)) 1
0 - 20.000 2
20,001 - 50,000 2
50.001 - 100,000 .3
100.001 - 250.000 .4
250,001 - 500.000 .a
500.001 - 1,000,000 10
1.000,001 - 2.000,000 to a maximum of .._._.» _.10
2.000.001 (and up) e 1 point additional for each 200.000 gpd capacity up ��
Design Flow (gpd)4 Swig pot,
(3) PRELIMINARY UNITS/PROCESSES(se.definition No.32) -
(a) Bar Screens CD
or2
(b) Mechanical Screens. Static Screens or Comminuting Devices 1
(c) Grit Removal
or 2
(d) Mechanical or Aerated Grit Removal
(e) Flow Measuring Device 1 1
or .
(() Instrumented Flow Measurement
(g) Prea.ratlon 2
(h) Influent Flow EqualIzatlon « _....„..._.........„...„ 2
(I) Grease or OII Separators • Gravity......»..._....«. .3
Mechanical 3
Dissolved Air Flotation 5
(1) Prechlorinatlon
(4) PRIMARYTREAT iOIr UNITS/PROCESSES 2
(a) Septic Tank (see definition No. 43) 2
(b) Imhoff Tank. 5
(c) Primary Clarifiers. lacilities for water
(d) Settling Ponds or Settling Tanks for Inorganic Non-toxic Materials(sludge handling
purification plants,sand.gravel.stone.and other mining operations except recreational activities such as gemor gold 2
)
SECONDARYTREAT ITTUNITS/PROCESSES
(5) (a) Carbonaceous Stage 20
(i) Aeration-High Purity Oxygen System 10
Diffused Air System (fixed, fioati or rotor)....._...»...»... ...«...»..._... ...» _..._........�
Mechanical Air System ng
Separate Sludge Reaeration
(il) Triddi g niter 7
High Rat. .«••••- 5
Standard Rate •--
Packed Tower .5
,_». 15
(ill) Biological Aerated Filter or Aerated Biological Filter__._»»......---•»••-•-»•••--« 10
Aerated Lagoons 10
(v) Rotating Biological Contactors 2
viand Filters -intermittent biological. 2
Recirculating biological
(vi) Stabilization Lagoons
(vitt) Moder nous removal by
Cho
(Ix) Single stage system for combined carbonaceous removal of SOD and nitroge
nitrification(see definition No. 12)(Pokes for this item haw to be in addition to Items
(5)(a)(1) through (5)(a)(viii), 2
utilizing the extended aeration process(see Minden No.3a)
utilizing other than the extended aeration process. . ...._.....«.
(x) Nutrient additions to enhance BOD removal ••••» .5
(xi) Biological Culture ('Super Bugs•)addition
(b) Nitrogenous Stage »_....»...._..»_....». _..20
(I) Aeration - High Purity Oxygen System.»....«.. ... ....-...«...._.
Diffused Air System «..._...«..._.10
Mechanical Air System (fixed, floating or rotor)_..._...»...-...»..._..._........_. A
Separate Sludge Reaeration .37
(g) Trickling Filter-High Rate 5
Standard Rate 5
Packed Tower « •••« _«,_,,__,_.10
(ill) Biological Aerated Filter or Aerated Biological Fitter.----...--.--...-.------
----.--....10
(Iv) Rotating Biological Contactors 1 0 0
(v) Sand Filter-Intermittent biological .2
Recirculating biological .5
(v1) Ch disr
(6) TERTIARY OR ADVANCED TREATMENT LNRS/PROCESSES
(a) Activated Carbon Beds- .5
without carbon regeneration 15
with carbon regeneration
(b) Powdered or Granular Activated Carbon Feed- 5
without carbon regeneration.... ...•15
with carbon regeneration •« 5
(c) DAkpen>lir ttlon Process .«.... 10
(d)
(e) Electrodialysis. .5
(i) Foam Separation. .. __ _ ..«... .5
(g) Ion Exchange.. (seedMlrtldon No.22b)(not appiabls for sand.gravel.store
(h) Land Application M Treated Effluent «...«..._...4
and other similar mining operations)by high rate infitration_... ..._...._..._...»..._...«..._...»..«_. 20
(I) Microscreens 5
Phosphorous Removal by Biological Processes(See definition No.25) 2
(k) Polishing Ponds - without aeration. «^ 2
with aeration....»»»

(I) Post Aeration - cascade
diffused or mechanical 0
(m) Reverse Osmosis 2
(n) Sand or Mixed-Media Filters - low rate .5
high rate 2
5
(o) Treatment processes for removal of metal or cyanide 5
(7) (SLUDGETREAeatment processes for removal of toxic materials other than metal or cyanide 15
15
(a) Sludge Digestion Tank - Heated (anaerobic)
Aerobic 1 0
Unheated(anaerobic)
.3
(b) Sludge Stabilization(chemical or thermal) .5
(c) Sludge Drying Beds-Gravity .5
Vacuum Assisted 2
(d) Sludge Elutriation .5
(e) Sludge Conditioner (chemical or thermal) .5
(i) Sludge Thickener (gravity)
.5
(9) Dissolved Air Flotation Unit (not applicable to a unit rated as (3)(1)) 8
( ) Sludge Gas Utilization (including gas storage) 8
(I) Sludge Holding Tank - Aerated 2
Non-aerated .5
(I) Sludge Incinerator(not including activated carbon regeneration) 2
(k) Vacuum Filter, Centrifuge,or Filter Press or other similar dewatering devices
1
(8) RESIDUALS UTILIZATION/DISPOSAL(including incinerated ash) 0
(a) Lagoons
(b) Land Application(surface and subsurface) (see definition 22a) 2
by contracting to a land application operator or landfill operator who holds the land
or landfill permit application permit 2
(9)
(DISNIECTEN
c) Dedicated l andfiil(burfal) by the permittee of the wastewater treatment facility..
. r ir7
(a) Chlorination .5
Dechlorination S
(b)
(c) Ozone .5
(d) Radiation .5
(10) CHEMICAL ADDITION SYSTEM(S)(see definition No.9)(not applicable to chemical additions rated as hem 3
(5)(a)(x . (6)(a), 6)( ,(7)(b). (7)(e), (9a), (9)(b) or (9)(c) 5 points each: ( )U).
List `
(11) MISCELLANEOUS UNITS/PROCESSES
(a) Holding Ponds,Holding Tanks or Settling Ponds for Organic or Toxic Materials Including wastes from mining
operations containing nitrogen or phosphorus compounds In amounts significantly greater than is common
for domestic wastewater
(b) Effluent Flow Equalization(not applicable to storage basins which are inherent In land .4
(d) PumpsDischarge(not applicable to storage basins inherent in landapplication--.... suns}.._ 2
application systems)--.....—...—_
(e) Stand-By Power Supply
(f) Thermal Pohutbn Control Device .3
TOTAL POINTS t_3
CLASSIFICATION
Claes I
Class 11 5-25 Points
Class II 26-50 Points
Class IV 51-65 Points
66-Up Points
Facilities having a rating of one through four points,Inclusive,do not require a certified operator.
Facilities having an activated sludge process wil be
assigned a minimum classification of Class IL
Facilities having treatment processes for the removal of metal or cyanide will be assigned a minimum classification of Class 11.
Facilities having treatment processes for the biological removal of phosphorus will be
assigned a minimum classification of Class Ill.
A004 DEFINfTIONS
The following definitions shall apply throughout this Subchapter.
(1)Activated Carbon Beds. A physicaVchemical method for reducing soluble organic material from wastewater effluent;The column-type
method will have a flow rate varying from two to eight gallons per minute per square foot and may be either upflow or downflow carbon
may not be regenerated on the wastewater treatment plant she; beds used in this
(2)Aerated Lagoons. A basin in which all solids are maintained In suspensionbeds. Carbon may or
accelerated transfer of oxygen on a flow-through basis; and by which
(3)Aeration. A process of bringing about Intimate contact between air or high u biological oxidation or organic matter k reduced through artificially
Aeration. An activated sludge process utilizing a minimum hydraulic detentiotime of 18 lana a Ilqufd by spraying, agitation or dlttuttbn;(3a) Extended
(4)Agriculturally managed she. Any she on which a
(5)Ag Stripping. A crop is produced,managed,and harvested(Crop Includes grasses,grains,trees,etc.);
re process by which the ammonium Ion is first converted to dissolved ammonia(pH adjustment)with the ammonia then released to the
atmo
os bon by physical means;or other similar processes which remove petroleum products Such as benzene,toluene.and xylene;
absorbed I purities;Regeneration. furnace to provide extremely The regeneration of exhausted carbon by the use of a
���' high temperatures which volatilize and oxidize the
(7)Carbonaceous Stage. A stage of wastewater treatment designed to achieve's
(8)Centrifuge. A mechanical device In which centrifugal force is used to �O"��effluent limits;
(9)Chemical Addition Systems-The addition of chemical(s)to wastewater in pylicds fromin point for
or tour separate Improvingoof solids
move,p;
alkalinity control,etc.;the capabllhy to experiment with different chemicals and different application points to achevesolids remobal, npH der dt onnt,
system;the capability to add chemicaf(s)to dual units will be rated as one system;capability to add a chemical at a different application pointse considered rod one
purposes will result in the systems being rated as separate systems; for different
(10)Chemical Sludge Conditioning. The addition of a chemical co
lime,its application to a dewaterkg device; mpound such as ionic chloride,or a polymer to wet sludge to coalesce the mass prior to
(11) Closed Cycle Systems. Use of holding ponds or holding tanks for containment
crushed stone or other similar operations.Such systems shall ftwoof points goffning pumpinggsnt�iesor non-toxic materials from appurtenances;gravel,
(12)Combined Removal of Carbonaceous BOO and Nitrogenous
a maximum of regardless facilities or other
and ammonia nitrogen within the same biological en0ce Removal by Nitrification-A single stage system required to achieve anyemit effluent limits on BOD
(13)Dechlorination. The partial or completer reduction of residual chlorine in a uid
(14) Denitrification Process. The CIIinn w. _I._._ _..___ req by ar1Y chemical nr r.hueL si

(15)Electrodialysis. Process for removing Ionized salts from water through the use of Ion-selective ion-exchange membranes;
(16)Finer Press. A process operated mechaNcally for partially dewatering sludge;
(17)Foam Separation. The planned frothing of wastewater or wastewater effluent as a means of removing excessive amounts of detergent materials through
the introduction of air In the form of fine bubbles;aal o d otcalled ll heavy loamfnerafracti smatter from wastewater, digestion chamber.
(18)Grit Removal. The process of removing grit
(19) Imhoff Tank. A deep two story wastewater tank consisting d an upper sedimentation chamber and a lower sludge
(20)1Instrumented d Flow Meawremeceess in which ions from two different molecules are exchanged:
(21)Ion Exchange. A chemical proapplied to land either by spraying on the surface or by subsurface injection
(22) Land application: which wet sludge may be
(a)Sludge Disposal. A final sludge disposal method by(i.e., chisel plow);[not applicable for types of sludge described In(11)of this Rule];
of wastewater onto a land area as a
(b)Treated Effluent. The process of spraying treated wastewater onto a land area or other methods of application
means of final disposal or treatment; rotatingdrum tiller operating under gravity
conditions as a polishing method for removing
(23)Microsween. A low speed,continuously back-washed. to oxidized nitrogen nitrate);
suspended solids from effluent; ammonia and organic nitrogen)
dpurpose of tox ammonia nitrogen(usually to uptake of nitrogen;(24)Nitrification PrStage.ocess. The tbrate stagemical conversionf wastewater of unoxidizedreatmtdesigned nitrogen( specifican urpo process designedconverting to enhance gphosphorus
(25)Phosphate movA separate Thehee of treatment from wastewaterte the P 9 luxury
(26) Phosphate Removal.Biological. removal of phosphorus bysuspended solids;
by the microorganisms; following secondary treatment with sufficient detention time to allow settling of finely
(27) Polishing Aeration.Pond. Aholdfo pond y treatment units to increase effluent D.O.or for any other purpose;gravity means of flowing down a
(29) Post (Aeration Cascade)
A polishing conventionalmhod by which dissolved oxygen is added to the effluent by a nonmechanical,gra y
seri(29) Post steps Aeration.orirs; The
l A ng steps or weirs moves In a fairly thin layer and the operation of the cascade requires no operator
adjust of ;thus,weirs; The lbw assuring eaven though the th byusingpowdered or
carbon process that utilizes biological activity and organic absorption
adjustment; zero points are assigned even this Is an essential step to meeting the limits of the discharge permit
(30)Powdered to Granular Activated Carbon Feed. A biophysical
granular activated carbon; Virgin or regenerated carbon is feed controlled Into the system;
(31) Preaeration. A tank constructed to provide aeration prior to primary treatment;
the liquor for subsequent major operations;
(32)Preliminary Units. Unit operations In the treatment process,such as screening and comminution.that prepare
(33) industrial mens tIndustrial. discharge,to remove or to neutralize substances Injurious toaotsewer and
(a)Pre-treatment Unit, The condriioNng of a waste at its source before body
water
treatment processes or to effect a partial reduction in load on the treatment process which is operated by the same governing
treatment plant being rated;
b)Pre-treatment Program.Industrial-must be a Stale or EPA required program to receive points on the rating sheet;
(34) Primary Clarifiers. The first settling tanks through which wastewater is passed In a treatment works for the purpose of removing settleable and suspended
solids and BOD which is associated with the solids;
(35) Pumps. All influent,effluent and in-plant pumps; pure liquid tree from
(36)Radiator. Disinfection or sterilization process utilizing devices emitting
ultraviolet
�prass�ed h rays;
a membrane forming nearly Iq
(37)Reverse Osmosis. A treatment process In which a heavy circular
(38)suspended Q Bol growth process In which wastewater flows through tanks in which a series of partially submerged
Rotating Biological Contractors. A fixed biological
surfaces are rotated;
Io^is
(39)Sand Filters:(aseptic tanks, lagoons,or some other treatment process in which further bb od(less than ons);
expected to produce e desired Rereuen of effluent ldbdiing uted In ac and have a resulting low 9Pels than o back
raul'tc loading rates on these filters are c� a of ih auk with the added capabii'ty o rely
tbl aeffluents;t Nye Subparagraph( )( )
b)Recirculating biological-the same type of sand filter as defined in Su a further reduction of suspended solids;
through the sand edia polishingprocess by which effluent limits are achieved through
(�(a)low orarte Mixed-Media
hydraulically adefilter with loading rates In the one to three gpm/sf range;
(b)high rate——a pressure.hydraulically loaded filter with loading rates in the live gpm/s1 range;At any rats,the loading rate will exceed three gprnl ;
(41)Secondary Clarifiers. A tank which follows the biological unit of treatment plant and which has the purpose of removing sludges associated with the
It
bological treatment units;
(42)Separate Sludge Reaeration. A part of the contact stabilization process where the activated sludge is transferred to a tank and aerated beforereturningIfno6
to the contact basin;
r
(43)Septic Tank. A single-story settling tank In which settled sludge 2,000 with
or lesshe whichws ewater rfl to through t the
shall not applicable
p)ic tankg systems serving singlets by residences having capacity
matter
(44)se
Sludge Digestion. The process by which organic or volatile matter and sludge is gasified,liquefied,mineralized or converted into more stableorganic
through the activity of living organisms,which includes aerated holding tanks: which digested sewage sludge Is dried by drainage and
(45)Sludge Drying Beds. An area comprising natural or artificial layers of porous materials uponwith fresh water or plant effluent;
evaporation; ss of sludge conditioning In which certain constituents are removed by successive washings
(46)Sludge Utilization.Elutriation. A Prime rocess of using sewage gas for the purpose of heating buildings,driving engines,etc.;
(47)(4be
8Sludge Gas ngnkThe pbe ants by containingadding a snap amount of which simply to keep the
kept Sludge Holding Tank(Aerated and Nonaerated). A tank utilized odrying
drywastewater); hbamaynt plants not addi a digester in sludge may used
ee,fresh,and but not necessarily
withdrawnyamount prior to a drying would
method
o
sludge not necessarily an that would be required to achieve stabilization of organic matter. A nonaeradad tank would simply
decant sludge prior to dewatering and would not allow long periods(several days of detention)without resulting odor problems;
rea ,and tor reducee s dee to a sterile rash;(49)Sludge Incinerators. A furnace designed to bum sludgesand to remove make
troatedall moisture and sfudge less odorousband materials� and reduce the sludge to a as '
(50) h Stabilizationbe (Chemadjustment,Thermal).et,chloriinnecess dosing.or by heat treatment;
content;This may done by pHrmitted to settle and thicken through agitation and gravity; to the water from
(51)2SludgeThickener. .A Aptypeof ofedimentotion tank in which the sludge is permitted
(52)Stabilization Lagoon. oxidation lagoon in which biological oxidation of organic matter k effected by natural transfer of oxygen
air (not a polishing pond); site or portable electrical generating equipment;
(53)Stand Sc Power Supply.
(54)Static Screens. A stationaryindustrial wastewater tremove solids.reatment systems; non-biodegradable particulate(Ibahable solids,suspended solids and BOD
a sand or coal fitter
reduction)from municipal which is primarily for the purpose of effluent polishing;A settling lagoon
(55)Tertiary Treatment A stage of treatment following secondary
might be employed for thisopurpose; providing for the transfer of heat from a fluid flowing In tubes to another fluid outside the tubes,or vice versa:
(56)Thermal Pollution Control Device. A device prong period of time to Improve the dewaterabplly of sludge by the
or
(5 ) means of regulatingCfit liquid tempeA conditioning
process by which heat is added for a protracted
(57)Thermal Sludge Conditioner. A hydrated sludge particles; exposure,Ingestion,Inhalation
(58)Toxic and rials. Those of the smaller and more sof wastes,ighly
or Maten o orism,e directly from h .nviron tent indirectly
ingestion ionrth ugh food chas which after ins, cause death,disease,behavioral
or their
ism,either directly from the environment or indirectly by fines deformations.In such organisms
ar assimilatbn into any, organism, h ical malfunctions(Including malfunctions In reproduction)or physical vanadium,arsenic,zinc,In such or the
abnormalities,cancer,genetic mutations,physiological
ene
offspring;Toxic materials ip eny, (PCBs)
of dichlorodip not Iimriatbn:lead,(DDT); any other materials that have or may hereafter be determined to have
(ONCE),polychtalnated biphenyls(PCBs)and dichtbrodiphemyl trkhbroethane(DDT):and any
rate trickling
toxic properties; per acre;
(59)Tricklingkwhicher. aA ted al betweennt10t unit consistingrngdnacre. A low rate trickling brokenitter is one which is designed to operate at one k over which wastewater is to lourtmgd
(60)0r Is one operated at ). plug10 andfl30 rped per producedown layers of media'quality effluent,material;or may Organic
Trickling F11ter(Packed lower). A lbw type of�retin�� icCesclYe ayl�ws���� essMe d or filUate
e
material is removed continually by the active biological fixed growthprior to disposal
adapted to produce a nitrified effluent;
d to remove excess water from either digested or undigested sludge
(61)Vacuum Filter.Centrifuges.or Filter Presses. Devices which are designs
or further treatment.

ondler.
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ne
001 Latitude 25°54'16" 002 Latitude 35"'54'17" 003 Latitude 34'54'17"
N
Longitude A20Q. '47" Lon itude aZLaaADI Long itude aZ aA2
ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT -DUTY ROAD HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
-ARD SURFACE UNIMPROVED ROAD
Map = D10NE
Sub -basin 040306
Stream Class
C-Trout
Discharge Class
41 14
Receiving Stream
North Toe River
Design 0 3.5 MGD
Permit expires 12/31/01
160
SCALE • •00
1 1 MILE
�— �— '11
• 7000
• •
CONTOUR INTERVAL 40 FEET
QUAD LOCATION
The Feldspar Corporation
NC0000353
Mitchell County